Door-lock



NITED STATES PATENT OFFICE.

JOHN C. KLINE, OF PITTSBURGH, PENNSYLVANIA.

DOOR-LOCK.

Specification of Letters Patent No. 13,037, dated June 12, 1855.

To all whom t may concern Be it known that I, JOHN O. KLINR, of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Right and Left Hand Door-Locks; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, forming part of this specification, of which- Figure l is a view of the inner parts of the lock, showing it in unlocked position; Fig. 2, a view of the lock bolt and connecting parts when in locked position; Fig. 3, a View of the latch bolt and connecting parts; Fig. 4, a section through the line I-II of Fig. l; Fig. 5, a section through the knobshank and hookshaped ends of the latchbolt; Fig. 6, a view of the night key; Fig. 7 a View of the lock key.

In all figures the same letters of reference indicate like parts.

A is the lock case; a a', two keyholes in reversed positions; b b', screwholes to fasten the lock to the door; p the coverplate of the case; B is the lockbolt; t t, inclined or oblique faces of the bolt, terminating in the notch d; C s the key tumbler, turning on the pin it; g g are projections or noses; f f, the key notches, being arranged in relation to the keyholes so that the key will operate the tumbler, when inserted into either of the two keyholes (a, a) Lis the latchbolt; c c are shoulders for the night key 9 to sit against, they are arranged in relation to the keyholes, that the night key can be set against them, when inserted into either of the keyholes, by this arrangement of the key tumbler notches (f f,) and latch bolt shoulders (c, 0') the lock is made reversible or right and left, the upper keyhole being always used for the night key, and the lower one for the lock key; c, e, are the hookshaped ends of the bolt; 'v o', projections cast on the case for the purpose of guiding the latchbolt.

E is the spring, which operates with the one end z on the lockbolt at w in backward direction, and with the other end g/ on the latchbolt in forward direction; lc is the pin, on which the spring is set; n is the lock-key; 9, the night key or night stopper; m, a shoulder at the end of the night key; 1 1" are projections in the case on which the night key rests, when not in use. The night key has to be put into its respective keyhole before the lock is fastened to the door, and the shoulder m being then between the woodwork of the door and the lockcase, keeps it in its place. The described arrangement of the keyholes, key tumblers, and night key and shoulders c c of the latchbolt is the same as that described inthe specification of the latch lock which was patented to me on January 16th a. c.

G is the knobshank; F, the knob; there is a notch cut out of the shank to receive the hookshaped ends c e of the latchbolt the hooks form acute angles B B and the surfaces of the notch Z Z are shaped accordingly, either straight as shown in Fig. 3 or curved as shown in Fig. 5. The angles B B are acute for the purpose of increasing the stroke of the bolt, in a respective turn of the shank.

The operation of the lock bolt and connecting parts is as follows: By turning the key n, the tumbler C turns on its pin L, whereby the nose gv operates on the oblique face t of the bolt B and forces the same forward, until the tumbler has acquired the position as shown in Fig. 2, when the nose (g) sits into the notch d, whereby the bolt is kept in locked state. The bolt, when moving, is guided by the arms Ic, which embrace the pin of the tumbler. During the operating of the nose g on the face t the other nose g of the tumbler is allowed to pass freely in a slot s, cut out of the bolt for this purpose. If the key is applied from the other key hole a (viz: when the lock is used for right-hand lock, the drawings showing the lock as left hand lock), then the nose g operates on the surface t of the tumbler, moves the bolt forward, and sits finally into the notch (l, in the meantime the nose g is allowed to pass freely in the slot s.

The noses operate on the lockbolt by means of the inclined or oblique surfaces t, t and stop the same by means of its sitting into the notch CZ.

What I claim and desire to secure by Letters Patent is- The inclined or oblique faces t t and notch d, of the bolt in connection with and operated by said key tumbler, substantially as described.

.JOHN C. KLINE. Witnesses:

HENRY MOSER, JOHN W. BARR. 

